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#!/usr/bin/env python

# -*- coding: utf-8 -*-



class PieceType(int):

    none = 0

    Pawn = 1

    Bishop = 2

    Knight = 3

    Rook = 4

    Queen = 5

    King = 6

    Pegasus = 7

    Pyramid = 8

    Unicorn = 9

    Wave = 10

    Star = 11

    Centaur = 12

    Serpent = 13

    Shaman = 14

    Monolith = 15

    Starchild = 16



    def __new__(cls, value):

        if PieceType._is_valid(value):

            return super(PieceType, cls).__new__(cls, value)

        else:

            raise ValueError("No such a piece type, received '%s'." % (str(value), ))



    def get_symbol(self):

        return { PieceType.none: ' ', 

                 PieceType.Pawn: 'P', 

                 PieceType.Bishop: 'B', 

                 PieceType.Knight: 'N', 

                 PieceType.Rook: 'R', 

                 PieceType.Queen: 'Q', 

                 PieceType.King: 'K', 

                 PieceType.Pegasus: 'G', 

                 PieceType.Pyramid: 'A', 

                 PieceType.Unicorn: 'U', 

                 PieceType.Wave: 'W',  

                 PieceType.Star: 'T', 

                 PieceType.Centaur: 'C', 

                 PieceType.Serpent: 'S', 

                 PieceType.Shaman: 'H', 

                 PieceType.Monolith: 'M', 

                 PieceType.Starchild: 'I' }[self.get_enumerated()]



    def get_name(self):

        return { PieceType.none: 'none', 

                 PieceType.Pawn: 'Pawn', 

                 PieceType.Bishop: 'Bishop', 

                 PieceType.Knight: 'Knight', 

                 PieceType.Rook: 'Rook', 

                 PieceType.Queen: 'Queen', 

                 PieceType.King: 'King', 

                 PieceType.Pegasus: 'Pegasus', 

                 PieceType.Pyramid: 'Pyramid', 

                 PieceType.Unicorn: 'Unicorn', 

                 PieceType.Wave: 'Wave',  

                 PieceType.Star: 'Star', 

                 PieceType.Centaur: 'Centaur', 

                 PieceType.Serpent: 'Serpent', 

                 PieceType.Shaman: 'Shaman', 

                 PieceType.Monolith: 'Monolith', 

                 PieceType.Starchild: 'Starchild' }[self.get_enumerated()] 



    def is_light(self):

        return self > PieceType.none 



    def is_dark(self):

        return self < PieceType.none 



    def is_light_or_dark(self):

        return self > PieceType.none 



    def get_enumerated(self):

        return PieceType(abs(self))



    def get_opposite(self):

        return PieceType(-self)



    @staticmethod

    def _is_valid(piece_type):

        return (-PieceType.Starchild) <= piece_type <= PieceType.Starchild 



    def is_valid(self):

        return PieceType._is_valid(self)